uip.lst

一个AVR 上的UIP移植程序

 560               	.LM73:
 561 0312 7091 0000 		lds r23,uip_buf+47
 562 0316 7230      		cpi r23,lo8(2)
 563 0318 61F5      		brne .L82
 513:uip.c         ****     goto reset;
 514:uip.c         ****   
 515:uip.c         ****   tmpport = BUF->destport;
 564               		.stabn 68,0,515,.LM74-uip_process
 565               	.LM74:
 566 031a A091 0000 		lds r26,uip_buf+36
 567 031e B091 0000 		lds r27,(uip_buf+36)+1
 568 0322 B093 0000 		sts (tmpport)+1,r27
GAS LISTING C:\DOCUME~1\pstang\LOCALS~1\Temp/ccSyaaaa.s 			page 20


 569 0326 A093 0000 		sts tmpport,r26
 516:uip.c         ****   /* Next, check listening connections. */  
 517:uip.c         ****   for(c = 0; c < UIP_LISTENPORTS && uip_listenports[c] != 0; ++c) {
 570               		.stabn 68,0,517,.LM75-uip_process
 571               	.LM75:
 572 032a 1092 0000 		sts c,__zero_reg__
 573 032e 4091 0000 		lds r20,uip_listenports
 574 0332 5091 0000 		lds r21,(uip_listenports)+1
 575 0336 4115      		cp r20,__zero_reg__
 576 0338 5105      		cpc r21,__zero_reg__
 577 033a D9F0      		breq .L82
 578               	.L90:
 518:uip.c         ****     if(tmpport == uip_listenports[c])
 579               		.stabn 68,0,518,.LM76-uip_process
 580               	.LM76:
 581 033c 6091 0000 		lds r22,c
 582 0340 E62F      		mov r30,r22
 583 0342 FF27      		clr r31
 584 0344 EE0F      		add r30,r30
 585 0346 FF1F      		adc r31,r31
 586 0348 E050      		subi r30,lo8(-(uip_listenports))
 587 034a F040      		sbci r31,hi8(-(uip_listenports))
 588 034c 2091 0000 		lds r18,tmpport
 589 0350 3091 0000 		lds r19,(tmpport)+1
 590 0354 8081      		ld r24,Z
 591 0356 9181      		ldd r25,Z+1
 592 0358 2817      		cp r18,r24
 593 035a 3907      		cpc r19,r25
 594 035c 09F4      		brne .+2
 595 035e 7DC0      		rjmp .L89
 596               		.stabn 68,0,517,.LM77-uip_process
 597               	.LM77:
 598 0360 862F      		mov r24,r22
 599 0362 8F5F      		subi r24,lo8(-(1))
 600 0364 8093 0000 		sts c,r24
 601 0368 8823      		tst r24
 602 036a 19F4      		brne .L82
 603 036c 4115      		cp r20,__zero_reg__
 604 036e 5105      		cpc r21,__zero_reg__
 605 0370 29F7      		brne .L90
 606               	.L82:
 519:uip.c         ****       goto found_listen;
 520:uip.c         ****   }
 521:uip.c         ****   
 522:uip.c         ****   /* No matching connection found, so we send a RST packet. */
 523:uip.c         ****   UIP_STAT(++uip_stat.tcp.synrst);
 524:uip.c         ****  reset:
 525:uip.c         **** 
 526:uip.c         ****   /* We do not send resets in response to resets. */
 527:uip.c         ****   if(BUF->flags & TCP_RST) 
 607               		.stabn 68,0,527,.LM78-uip_process
 608               	.LM78:
 609 0372 72FD      		sbrc r23,2
 610 0374 7EC3      		rjmp .L58
 528:uip.c         ****     goto drop;
 529:uip.c         **** 
 530:uip.c         ****   UIP_STAT(++uip_stat.tcp.rst);
GAS LISTING C:\DOCUME~1\pstang\LOCALS~1\Temp/ccSyaaaa.s 			page 21


 531:uip.c         ****   
 532:uip.c         ****   BUF->flags = TCP_RST | TCP_ACK;
 611               		.stabn 68,0,532,.LM79-uip_process
 612               	.LM79:
 613 0376 84E1      		ldi r24,lo8(20)
 614 0378 8093 0000 		sts uip_buf+47,r24
 533:uip.c         ****   uip_len = 40;
 615               		.stabn 68,0,533,.LM80-uip_process
 616               	.LM80:
 617 037c 88E2      		ldi r24,lo8(40)
 618 037e 8093 0000 		sts uip_len,r24
 534:uip.c         ****   BUF->tcpoffset = 5 << 4;
 619               		.stabn 68,0,534,.LM81-uip_process
 620               	.LM81:
 621 0382 80E5      		ldi r24,lo8(80)
 622 0384 8093 0000 		sts uip_buf+46,r24
 535:uip.c         **** 
 536:uip.c         ****   /* Flip the seqno and ackno fields in the TCP header. */
 537:uip.c         ****   c = BUF->seqno[3];
 623               		.stabn 68,0,537,.LM82-uip_process
 624               	.LM82:
 625 0388 9091 0000 		lds r25,uip_buf+41
 538:uip.c         ****   BUF->seqno[3] = BUF->ackno[3];  
 626               		.stabn 68,0,538,.LM83-uip_process
 627               	.LM83:
 628 038c 8091 0000 		lds r24,uip_buf+45
 629 0390 8093 0000 		sts uip_buf+41,r24
 539:uip.c         ****   BUF->ackno[3] = c;
 540:uip.c         ****   
 541:uip.c         ****   c = BUF->seqno[2];
 630               		.stabn 68,0,541,.LM84-uip_process
 631               	.LM84:
 632 0394 3091 0000 		lds r19,uip_buf+40
 542:uip.c         ****   BUF->seqno[2] = BUF->ackno[2];  
 633               		.stabn 68,0,542,.LM85-uip_process
 634               	.LM85:
 635 0398 8091 0000 		lds r24,uip_buf+44
 636 039c 8093 0000 		sts uip_buf+40,r24
 543:uip.c         ****   BUF->ackno[2] = c;
 637               		.stabn 68,0,543,.LM86-uip_process
 638               	.LM86:
 639 03a0 3093 0000 		sts uip_buf+44,r19
 544:uip.c         ****   
 545:uip.c         ****   c = BUF->seqno[1];
 640               		.stabn 68,0,545,.LM87-uip_process
 641               	.LM87:
 642 03a4 4091 0000 		lds r20,uip_buf+39
 546:uip.c         ****   BUF->seqno[1] = BUF->ackno[1];
 643               		.stabn 68,0,546,.LM88-uip_process
 644               	.LM88:
 645 03a8 8091 0000 		lds r24,uip_buf+43
 646 03ac 8093 0000 		sts uip_buf+39,r24
 547:uip.c         ****   BUF->ackno[1] = c;
 647               		.stabn 68,0,547,.LM89-uip_process
 648               	.LM89:
 649 03b0 4093 0000 		sts uip_buf+43,r20
 548:uip.c         ****   
GAS LISTING C:\DOCUME~1\pstang\LOCALS~1\Temp/ccSyaaaa.s 			page 22


 549:uip.c         ****   c = BUF->seqno[0];
 650               		.stabn 68,0,549,.LM90-uip_process
 651               	.LM90:
 652 03b4 2091 0000 		lds r18,uip_buf+38
 653 03b8 2093 0000 		sts c,r18
 550:uip.c         ****   BUF->seqno[0] = BUF->ackno[0];  
 654               		.stabn 68,0,550,.LM91-uip_process
 655               	.LM91:
 656 03bc 8091 0000 		lds r24,uip_buf+42
 657 03c0 8093 0000 		sts uip_buf+38,r24
 551:uip.c         ****   BUF->ackno[0] = c;
 658               		.stabn 68,0,551,.LM92-uip_process
 659               	.LM92:
 660 03c4 2093 0000 		sts uip_buf+42,r18
 552:uip.c         **** 
 553:uip.c         ****   /* We also have to increase the sequence number we are
 554:uip.c         ****      acknowledging. If the least significant byte overflowed, we need
 555:uip.c         ****      to propagate the carry to the other bytes as well. */
 556:uip.c         ****   if(++BUF->ackno[3] == 0) {
 661               		.stabn 68,0,556,.LM93-uip_process
 662               	.LM93:
 663 03c8 9F5F      		subi r25,lo8(-(1))
 664 03ca 9093 0000 		sts uip_buf+45,r25
 665 03ce 9923      		tst r25
 666 03d0 79F4      		brne .L92
 557:uip.c         ****     if(++BUF->ackno[2] == 0) {
 667               		.stabn 68,0,557,.LM94-uip_process
 668               	.LM94:
 669 03d2 832F      		mov r24,r19
 670 03d4 8F5F      		subi r24,lo8(-(1))
 671 03d6 8093 0000 		sts uip_buf+44,r24
 672 03da 8823      		tst r24
 673 03dc 49F4      		brne .L92
 558:uip.c         ****       if(++BUF->ackno[1] == 0) {
 674               		.stabn 68,0,558,.LM95-uip_process
 675               	.LM95:
 676 03de 842F      		mov r24,r20
 677 03e0 8F5F      		subi r24,lo8(-(1))
 678 03e2 8093 0000 		sts uip_buf+43,r24
 679 03e6 8823      		tst r24
 680 03e8 19F4      		brne .L92
 559:uip.c         **** 	++BUF->ackno[0];
 681               		.stabn 68,0,559,.LM96-uip_process
 682               	.LM96:
 683 03ea 2F5F      		subi r18,lo8(-(1))
 684 03ec 2093 0000 		sts uip_buf+42,r18
 685               	.L92:
 560:uip.c         ****       }
 561:uip.c         ****     }
 562:uip.c         ****   }
 563:uip.c         ****  
 564:uip.c         ****   /* Swap port numbers. */
 565:uip.c         ****   tmpport = BUF->srcport;
 686               		.stabn 68,0,565,.LM97-uip_process
 687               	.LM97:
 688 03f0 2091 0000 		lds r18,uip_buf+34
 689 03f4 3091 0000 		lds r19,(uip_buf+34)+1
GAS LISTING C:\DOCUME~1\pstang\LOCALS~1\Temp/ccSyaaaa.s 			page 23


 566:uip.c         ****   BUF->srcport = BUF->destport;
 690               		.stabn 68,0,566,.LM98-uip_process
 691               	.LM98:
 692 03f8 8091 0000 		lds r24,uip_buf+36
 693 03fc 9091 0000 		lds r25,(uip_buf+36)+1
 694 0400 9093 0000 		sts (uip_buf+34)+1,r25
 695 0404 8093 0000 		sts uip_buf+34,r24
 567:uip.c         ****   BUF->destport = tmpport;
 696               		.stabn 68,0,567,.LM99-uip_process
 697               	.LM99:
 698 0408 3093 0000 		sts (uip_buf+36)+1,r19
 699 040c 2093 0000 		sts uip_buf+36,r18
 568:uip.c         ****   
 569:uip.c         ****   /* Swap IP addresses. */
 570:uip.c         ****   tmpport = BUF->destipaddr[0];
 700               		.stabn 68,0,570,.LM100-uip_process
 701               	.LM100:
 702 0410 2091 0000 		lds r18,uip_buf+30
 703 0414 3091 0000 		lds r19,(uip_buf+30)+1
 571:uip.c         ****   BUF->destipaddr[0] = BUF->srcipaddr[0];
 704               		.stabn 68,0,571,.LM101-uip_process
 705               	.LM101:
 706 0418 8091 0000 		lds r24,uip_buf+26
 707 041c 9091 0000 		lds r25,(uip_buf+26)+1
 708 0420 9093 0000 		sts (uip_buf+30)+1,r25
 709 0424 8093 0000 		sts uip_buf+30,r24
 572:uip.c         ****   BUF->srcipaddr[0] = tmpport;
 710               		.stabn 68,0,572,.LM102-uip_process
 711               	.LM102:
 712 0428 3093 0000 		sts (uip_buf+26)+1,r19
 713 042c 2093 0000 		sts uip_buf+26,r18
 573:uip.c         ****   tmpport = BUF->destipaddr[1];
 714               		.stabn 68,0,573,.LM103-uip_process
 715               	.LM103:
 716 0430 2091 0000 		lds r18,uip_buf+32
 717 0434 3091 0000 		lds r19,(uip_buf+32)+1
 718 0438 3093 0000 		sts (tmpport)+1,r19
 719 043c 2093 0000 		sts tmpport,r18
 574:uip.c         ****   BUF->destipaddr[1] = BUF->srcipaddr[1];
 720               		.stabn 68,0,574,.LM104-uip_process
 721               	.LM104:
 722 0440 8091 0000 		lds r24,uip_buf+28
 723 0444 9091 0000 		lds r25,(uip_buf+28)+1
 724 0448 9093 0000 		sts (uip_buf+32)+1,r25
 725 044c 8093 0000 		sts uip_buf+32,r24
 575:uip.c         ****   BUF->srcipaddr[1] = tmpport;
 726               		.stabn 68,0,575,.LM105-uip_process
 727               	.LM105:
 728 0450 3093 0000 		sts (uip_buf+28)+1,r19
 729 0454 2093 0000 		sts uip_buf+28,r18
 576:uip.c         **** 
 577:uip.c         ****   /* And send out the RST packet! */
 578:uip.c         ****   goto tcp_send_noconn;
 730               		.stabn 68,0,578,.LM106-uip_process
 731               	.LM106:
 732 0458 CDC2      		rjmp .L95
 733               	.L89:
GAS LISTING C:\DOCUME~1\pstang\LOCALS~1\Temp/ccSyaaaa.s 			page 24


 579:uip.c         **** 
 580:uip.c         ****   /* This label will be jumped to if we matched the incoming packet
 581:uip.c         ****      with a connection in LISTEN. In that case, we should create a new
 582:uip.c         ****      connection and send a SYNACK in return. */
 583:uip.c         ****  found_listen:
 584:uip.c         ****   /* First we check if there are any connections avaliable. Unused
 585:uip.c         ****      connections are kept in the same table as used connections, but
 586:uip.c         ****      unused ones have the tcpstate set to CLOSED. */
 587:uip.c         ****   for(c = 0; c < UIP_CONNS; ++c) {
 734               		.stabn 68,0,587,.LM107-uip_process
 735               	.LM107:
 736 045a 1092 0000 		sts c,__zero_reg__
 737               	.L102:
 588:uip.c         ****     if(uip_conns[c].tcpstateflags == CLOSED) 
 738               		.stabn 68,0,588,.LM108-uip_process
 739               	.LM108:
 740 045e 4091 0000 		lds r20,c
 741 0462 242F      		mov r18,r20
 742 0464 3327      		clr r19
 743 0466 89E1      		ldi r24,lo8(25)
 744 0468 90E0      		ldi r25,hi8(25)
 745 046a 289F      		mul r18,r24
 746 046c F001